Drain and squeeze the water off the artichoke hearts.  Chop the artichoke fairly fine.  Remember, this is a spread.  Stir in the mayo, parmesan, garlic powder and salt & pepper to taste.  Put in a ovenproof serving dish and bake for about 30 minutes at 350 degrees till the top is golden brown and bubbly.  Serve with crackers.  I like to use Triscuits.  This spread is so popular, even people that think they don't like artichokes will love it and beg you to make more!